I finally came upon a Nero window where, at the very bottom, I noticed something written in red. DUH!!! Must be a warning. I looked a bit closer and there side by side were two buttons to choose. The left, in red was telling me that the windows default files were corrupt, the one on the right was telling me to click there to use the Nero ones. (Could they be the files that I replaced under your guidance?)
Well I told myself that I had nothing to lose at that point and clicked away and suddenly, I am back burning DVD media and able to make full backups.
Conclusion: Happy ending and thank you for the time you put into this stupid problem of mine.
Trevuren